LeBlanc waves to the bride and groom and their wedding guests. Photograph: Hoonigan Racing/Ron Zaras/PA

Their tour of the capital in Block’s 845bhp four-wheel drive Hoonicorn Mustang took them over Tower Bridge, where they snapped a picture using a selfie stick.

American actor LeBlanc is apparently still unfamiliar with London. He was pictured clutching a guidebook as he navigated the unfamiliar streets, with Block at the wheel.

Filming for the Top Gear relaunch is well under way, as the new series of the BBC Two show is due to start in May. The seven-strong lineup includes LeBlanc, radio DJ and presenter Chris Evans, and Top Gear stalwart The Stig.